ARTFEED — Contemporary Art Intelligence

Kate Warne: America's First Female Detective and Her Civil War Espionage

other · 2026-09-30

In 1856, at the age of 23, Kate Warne became the first female detective in America after persuading Allan Pinkerton to employ her, asserting that women could gather information more effectively than men. Her initial significant case involved the embezzlement at Adams Express Company, where she developed a friendship with Nathan Maroney's wife, leading to the recovery of $50,000 (over $2 million today) and Maroney’s conviction. This achievement led to the formation of the Female Detective Bureau, with Warne as its leader. During the Civil War, she disguised herself as a Southern belle to uncover a plot against President-elect Abraham Lincoln, later traveling with him in disguise. Warne passed away from pneumonia in early 1868 at the young age of 25 and is interred near Pinkerton in Chicago's Graceland Cemetery. Most of her records were lost in the Great Chicago Fire of 1871, leaving behind only a watercolor portrait and Pinkerton's embellished novels as remnants of her legacy.

Key facts

  • Kate Warne became America's first female detective after convincing Allan Pinkerton to hire her in 1856.
  • She was 23 years old when she responded to a newspaper ad and joined the Pinkerton Detective Agency.
  • Her first major case was the Adams Express Company embezzlement, where she helped convict Nathan Maroney of stealing $50,000 (over $2 million today).
  • Pinkerton created the Female Detective Bureau with Warne in charge following her success.
  • During the Civil War, she infiltrated Southern society and uncovered a plot to assassinate President-elect Abraham Lincoln in Baltimore.
  • She accompanied Lincoln on a train through Maryland, disguised as his caretaker and sister, while he posed as an invalid.
  • After the war, she worked as Supervisor of Women Agents, solving a murder and theft of over $130,000 (about $5 million today) and going undercover as a fortune teller.
  • Warne died of pneumonia in early 1868 at age 25 and is buried near Allan Pinkerton in Graceland Cemetery, Chicago.
  • The Great Chicago Fire of 1871 destroyed most Pinkerton Detective Agency records, erasing much of her history.
  • Only one known image of Kate Warne exists: a watercolor portrait held by the Chicago History Museum.

Entities

Artists

  • Kate Warne
  • Allan Pinkerton
  • Abraham Lincoln
  • Nathan Maroney

Institutions

  • Pinkerton Detective Agency
  • Adams Express Company
  • Female Detective Bureau
  • Chicago History Museum
  • National Park Service
  • Library of Congress
  • Architect of the Capitol
  • Wikimedia Commons
  • Flickr

Locations

  • Baltimore
  • Maryland
  • United States
  • Chicago
  • Illinois
  • Graceland Cemetery

Sources